Canon iR5800C, iR5800CN, iRC6800C, iRC6800CN df-168

Canon Service Bulletin COPIER

Issued by Canon Europa N.V.

Model:
DADF-M1

Location:

DOCUMENT TRAY ASSEMBLY

Subject:

Frequent Appearance of Message Prompting to Clean ADF Scanning Glass

Detail:

<Symptom>
The following message is displayed on the LCD of the host machine in order to prompt users to clean the ADF
scanning glass, although there is no dust on the glass.

Message:
Originals may not be scanned clearly (streaks may appear). Clean the thin glass strip as shown in the illustration
with a damp, well wrung-out cloth.

Ref No.:

DF-168
(F3-T01-00X-10014-01)

Date:

25-06-04

<Cause>
The starting position of the image scanning in the main scanning direction when using ADF (stream reading) is
determined by the position of the original. The dust detection area is determined with reference to the scanning
starting position. Also, the position of the original is determined by the position of t he side guide plates of the
ADF.
If the side guide plates are fixed at a position where the edge of the original comes close to the edge of the platen
roller, the roller edge will come in the dust detection area and finally be detected as dust.

<Factory Measures>

1. RCON software of the host machine is upgraded to Ver.8.01 so that the dust detection area is changed from
301mm to 298mm.

2. The procedure for adjusting the side guide plates of the DF is changed.

Service Work:

When the above symptom occurs, upgrade the Rcon Software of the host machine to Ver.8.01, referring to the
Service Information F2-T01-0M3-10016 (System Sof tware information for iRC6800 series).

When the upgrade still fails to remove the symptom, see the attached procedure below and adjust the horizontal
registration as well.

(1/1)

Horizontal Registration

(Prevention of

Massage

Frequent ADF reading Glass Cleaning

)

1. Adjusting the Side Guide Plate Position of

the ADF Original Pickup Tray

1) Place an original of A3 or 11x17 on the original
pickup tray. Press the Start key to run the machine.

2)

Stop the machine forcibly when the original
passes through the platen roller by opening the
feeder cover.

3)

Open the ADF, check the horizontal registration
(front: A/ rear: B) of the original [1] with reference
to the platen roller [2], and take a note of the
measurement.

Standard Measurement:
Original of A3: A=B=3.5mm
Original of 11x17: A=B=12.5mm

6) Loosen the mounting screw [1], and remove the

screw [2] from the positioning hole, and fit it and

temporarily tighten it in the adjusting angular hole

[3].

4) Open the feeder cover, and detach the inside

cover.

5) Remove the 3 mounting screws [1], and detach

the cover [2].

- if A > B, move the volume unit [4] to the front.

- if A < B, move the volume unit [4] to the rear.

Standard Measurement:

Original of A3: A=B=3.5mm

Original of 11x17: A=B=12.5mm

7) Tighten the screw [1] that has been tentatively

tightened and the screw [3] that has been fitted in

the adjusting angular hole.

8) When done, mount back the cover.